/*
 * Copyright (c) 2003-2005 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Gabe Black
 *          Kevin Lim
 */

#include "arch/trips/faults.hh"
#include "arch/trips/tlb.hh"
#include "cpu/thread_context.hh"
#include "cpu/base.hh"
#include "base/trace.hh"
#if !FULL_SYSTEM
#include "sim/process.hh"
#include "mem/page_table.hh"
#endif

namespace TripsISA {

FaultName TripsFault::_name = "Trips fault";
FaultVect TripsFault::_vect = 0x0; // No handler vector in SE mode
FaultStat TripsFault::_count;

FaultName TripsSyscallFault::_name = "Trips syscall fault";
FaultVect TripsSyscallFault::_vect = 0x0; // No handler vector in SE mode
FaultStat TripsSyscallFault::_count;

#if !FULL_SYSTEM

void 
TripsFault::invoke(ThreadContext * tc)
{
    DPRINTF (TripsFault, "Invoking fault\n"  );
    panic("Trips fault unimplemented.\n");
}

void 
TripsSyscallFault::returnFromSyscall(ThreadContext * tc)
{
    // For trips syscall, PC after syscall will be redirect according to
    // global regfile r2

    IntReg reg = tc->readIntReg(ReturnAddressReg);

    DPRINTF(TripsFault, "Trips syscall fault return,"
            " return address is %#x\n",
            reg);

    tc->setBlockPC(reg);
}

void
TripsSyscallFault::invoke(ThreadContext * tc)
{
    IntReg callnum = tc->readIntReg(SyscallNumReg);

    DPRINTF(TripsFault, "Invoking trips syscall fault,"
            " call number %i\n",
            callnum);

    tc->syscall(callnum);

    returnFromSyscall(tc);
}

#endif
} // namespace TripsISA

